Cationic aqueous bituminous emulsion-aggregate slurries
AssigneeWestvaco Corporation
InventorsPeter Schilling, Hans G. Schreuders
Life of this patent
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Abstract
Cationic aqueous bituminous emulsion-aggregate slurries are disclosed to be formed with cationic emulsions prepared at elevated temperatures by emulsifying bitumen, such as an asphalt, in water with a cation-active emulsifier which is the product of the reaction of modified polyamine with certain polycarboxylic acids and anhydrides. The modified polyamines are obtained by reacting suitable polyalkylene amines with a sugar-containing syrup, preferably molasses.
Claims7
A composition of matter obtained by reacting a modified polyamine with a member of the group of precursors consisting of sulfonated fatty acids, resin acids (rosin) reacted with maleic anhydride or fumaric acid, and epoxidized esters of unsaturated fatty esters such as tallates, oleates, linoleates, glycerides, and polycarboxylic acids and their anhydrides of the general formulae ##STR5## wherein x and y are integers from 3 to 9, x and y together equal 10-14, at least one Z is a carboxylic acid group and any remaining Z is hydrogen and wherein the modified polyamine is obtained by reacting a polyalkylene amine with a sugar-containing syrup.
A method of forming a bituminous emulsion at a temperature above 100.degree. F. comprising
- (1) from about 30% to about 80% by weight of bitumen,
- (2) from about 0.1% to about 10% by weight of an emulsifier obtained by reacting a modified polyamine with a precursor selected from the group consisting of fatty acids, animal fats, vegetable oils, tall oil, reaction products of tall oil fatty acids with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic anhydride, sulfonated fatty acid, sulfonated resin acids, and reaction products of resin acids with a member of the group consisting of acrylic acid, fumaric acid, and maleic anhydride, epoxidized fats, vegetable oils, and fatty acid esters, and
- (3) water to make up 100% by weight, wherein the modified polyamine is obtained by reacting a polyalkylene amine with a sugar-containing syrup.
A method of forming a paving slurry seal mixture of an aqueous bituminous emulsion and mineral aggregate capable of being worked at a temperature above 100.degree. F. comprising
- (1) mineral aggregate, and
- (2) from about 8% to about 20% of an oil in water type emulsion, based on the weight of the mineral aggregate, wherein the emulsion is comprised of from about 55% to about 65% bitumen, based on the weight of the emulsion, from about 0.5% to about 2% of a cation-active emulsifier, based on the weight of the emulsion, wherein the emulsifier is obtained by reacting a modified polyamine with a precursor selected from the group consisting of fatty acids, animal fats, vegetable oils, tall oil, reaction products of tall oil fatty acids with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic anhydride, sulfonated fatty acid, sulfonated resin acids, and reaction products of resin acids with a member of the group consisting of arylic acid, fumaric acid, and maleic anhydride, epoxidized fats, vegetable oils, and fatty acid esters, and water to make up 100% by weight of the emulsion, and from about 4% to about 16% water, based on the weight of the aggregate, to form a slurry of the aggregate and the emulsion, wherein the modified polyamine is obtained by reacting a polyalkylene amine with a sugar-containing syrup.
Dependencies are inferred from the claim text.